Angel Francisco MartinezApplication Engineer
MIDAS NY
3D Tunnel Modeling and Excavation
01 Introduction
02 Benefits of GTS NX for Tunneling
03 Demo
Content
Introduction
No. 1 in software for civil engineering
650 Developers and Engineers
120 Distribute in 120 countries
10,000 Clients
30,000 Licenses
About MIDAS
midas FX+
midas NFX
Mechanical
General Pre & Post Processor
for Finite Element Analysis
Integrated Design System
for Building and General Structures
midas Gen
Buildings and General Structures
2D / 3D Geotechnical and Tunnel
analysis System
midas GTS NX
SoilWorks
Geotecnical
midas Civil
midas FEA
Bridges
Integrated Solution System
for Bridge and Civil Structures
Advanced Nonlinear and Detail
Analysis System
Products
Total Solutions for True Analysis-
driven Design
Geotechnical Solutions for Practical
Design
midas Design+Structural Component Design &
Detailing
northamerica.midasuser.com
www.midasgtsnx.com
Network Global
Korea
USA
Japan
China
India
UK
Russia
Argentina
Bolivia
Brazil
Chile
Colombia
Czech
Ecuador
Egypt
Ethiopia
Greece
Indonesia
Italy
Thailand
Turkey
United Kingdom
Venezuela
Vietnam
UAE
Lithuania
Malaysia
Mexico
Nigeria
Philippines
Puerto Rico
Russia
Singapore
Slovenia
Spain
Taiwan
Tanzania
Headquarters
& Branches
Export to over 120 countries
Retains the largest CAE market share
Benefits of GTS NX for Tunneling
Integrated Solver Optimized for the next generation 64-bit platform
Finite Element Solutions for Geotechnical Engineering
Why GTS NX for Tunnels
Friendly Interface
8
Complete Innovating
Integrated Solver Optimized for the next generation 64-bit platform
Finite Element Solutions for Geotechnical Engineering
Friendly Interface
9
Friendly User InterfaceCommands based on AutoCADWork treeMessage window
Friendly Interface
Simplified ModelingAutoCAD geometries ImportVerification of connection before and after meshing
Friendly Interface
Advanced MeshingMesh size controlIntegrations of embedded structural elements and connected with mesh
Friendly Interface
Integrated Solver Optimized for the next generation 64-bit platform
Finite Element Solutions for Geotechnical Engineering
16
Complete
Any type of tunnel
Complete
Parametric Analysis
•Compare results in
same model by
varying specific
parameters.
K0 = 0.5 @4.3mm K0 = [email protected]
K0 = 1.5 @8.3mm K0 = [email protected]
Complete
Semi Coupled Analysis
- Pore Pressure
- Flow Path
- Nodal Head
Complete
Flow Paths
Flow Quantity
Jointed Rock Mass and Faults
GTS NX also allows you to model rock faults
using an interface.
A plane of the surface is used to model the
discontinuity.
Complete
Wizard for easy construction stages set up
Complete
Structural data base
•Extraction of 2D and 1D elements to model reinforcement as a shotcrete and rock bolts
Complete
Rock Bolts ShotcreteTunnel walls
Completo
Constitutive Models
Safety Factor
Cohesion, Friction Angle and tensile strength (optional) can be defined as the failure criteria. Users can find out, potential failure and plastic failure zone directly.
[Modelo : Excavación de túnel en 2D] [Estado de plasticidad: Tensión de Elementos] [Factor de Seguridad (solo aéreas menor a 1.2)]
[Modelo : Excavación Profunda en 3D]
Complete
TBM
Complete
Complete
Loads
Result Extraction
Complete
Integrated Solver Optimized for the next generation 64-bit platform
Finite Element Solutions for Geotechnical Engineering
28
Innovative
Wizard Túnel
Innovative
Wizard - General
Input tunnel size and cut type
Innovative
Wizard – Reinforcement
Input support distribution and material
Innovative
Wizard – Excavation
Input Excavation stages and direction.
Innovative
Wizard – MeshInput Mesh Size and soil properties.
Innovative
Wizard – Results
Innovative
Demo
Modeling 3D Tunnel
Weathered Soil
Soft Rock
Bed Rock
Geometry Modeling
1. IMPORT Soil CAD Files (units m)
2. Generate Strata: Extrude -200m
3. Divide layers by the 7 surfaces
1
3
2
Geometry Modeling
1. Delete 4 left over geometries on borders
2. IMPORT Tunnel CAD Files (units m)
3. Translate tunnel geometry with 2 point vector
3
1
2
Point 1
Point 2
Geometry Modeling
Connect CAD
1. Imprint 160 points on last face
Shortest path option
2. Auto Connect all solids >
Boolean
3. Check Duplicates before and
after3
1
2
Material Import
1. IMPORT MATERIAL Properties
2. Open: Final tunnel with umbrella
reinforcement file
3. Import All
3
21
Mesh Generation
Generate Mesh and Create Elements
Tunnel elements: Size 2m
Varying Soil Properties
1st segments : Weathered Soil
2nd segments: Soft Rock
3rd segments: Bed Rock
Weathered Soil
Soft Rock Bed Rock32
1
Mesh Generation
Generate Mesh and Create Elements
1. Reinforce Zones with Pipe Beams: 2m
3
2
1
4
Mesh Generation
Generate Mesh and Create Elements
1. Layer 1: Size 6m / Property Weathered rock
2. Layer 2: Size 12m / Property Soft rock
3. Layer 3: Size 18m / Property Bed rock
Check Mesh
32
1
Mesh Generation
Create Shell Elements
1. Extract Tunnel Lining
2. Delete ends and bottom
2
1
Mesh Generation
Generate Mesh and Create Elements
1. Mesh Structural 1D elements
Top and bottom sets
2. Translate Mesh sets in X direction
Copy and move top rock bolts sets 4m 35 times
Repeat for bottom rock bolt set
2
1
1. Load Conditions
• Self weight load
2. Boundary Conditions
• Auto Ground Support
• Beam rotation restriction
Loads & Boundary Conditions
2
1
Renumber Tunnels mesh sets
1. Top sets
2. Bottom sets
Construction Stages
21
Renumber mesh sets
1. Walls - Top sets
2. Walls - bottom sets
Construction Stages
21
Boundary Conditions >
Change properties
1. 3D umbrella sets
2. 2D tunnel wall sets top
and bottom
Loads & Boundary Conditions
21
1. Create Stage Set
2. Stage Definition Wizard
• I.S. all soil
• Fill in rules as
shown
• Apply Rules
Construction Stages
2
1
CS
1. Add Null stage #2: Click ON Clear Displacements and SRM (slope stability)
2. Add Excavation stage #3: Deactivate Cut Excavation set
Construction Stages
2
1
CS
Add 6 Umbrella mesh sets to stages: S3, S9, S15, S21, S27, S33
Construction Stages
1. Set CS Analysis Case
Analysis Control• Stress Initiation
• k0 condition
Output Control
• Check on strains
2. Run analysis
Analysis Case
2
1
Post-Processing
Results
1. Null Stage SRM: FOS 2.2
Strains > Max Shear Strains
2. Stage 43 > Displacements > Total
3. Make cut on Y plane and Probe (3D - 2D
Wizard)
Probe Results from Cut
2
1
3
Post-Processing
1. Extract Results for construction stages
2. Settlement Profile Tz max
3. On Table Right Click > Show Graph
2
1
3
Post-Processing
Extract Results for construction stages
Max displacements of tunnel crown
Post-Processing
Forces and moments in structural members
1. Truss
2. Beam
3. Shell
2
1
3
Integrated Solver Optimized for the next generation 64-bit platform
Finite Element Solutions for Geotechnical Engineering
Thanks!http://globalsupport.midasuser.com/helpdesk/